Power transmission wheel



May 7, 1935. H. H. FRICK 2,000,834

' POWER TRANSMISSION WHEEL Filed June 21, 1950 s Sheets-Sheet 1 May 7, 1935. H. H. FRlCK POWER TRANSMISSION WHEEL 3 S eats-Sheet 2 Filed June 21, 1930 "Patented May 7,1935

- ihahdwheels; orothe r' wheels wherebyjpoweris transmitted to or from a shaft, anaqme ger eral 5 object or jthe m eimon is'fto mm the w eel d t if i iel ore sitgiipfr'th renpmy p Y My invention? is illustrated inf'the accompany:

drawin whe'rein;+" .1

see'ure a betterapplication*bfpowerfeither i emit-11 steam v e 9h th 1 M l 'lg'urei-i :both I of the side-plates being? in place;

t es s bei a e dunm the a hatfils as m e ther w thhe. disk il p c d a art Mas i ho i p lx Figu nd i n d in the spac s e. a plu alit Qt amflsnokes vf h imcrasm in wid h imumr rriua i t ward th 7;; n of m wheelies asyil u trat d n Fi re 35 projectin sli husnnetdnd. we .n m tr,,.. i h

' 'disks ligand lzi; Each or theseia iiis brsspokes "Ma is pivotedhpon ,it's inner end upo ;corre- 'sponding boltj l 5 which passes through he disks .il and iz at ajfpoinfafijacnt the-hi bQ The outerendot each spoke or arm5l 4 jat one endotjits v perimeter isextendedto iorm .thefllug or extension f nd dispwed IQ t h 4 w ll l disposed fmmediatelxbeneaith"leaoh gezrtensionJ6 is" a bo1tl wrouer l8- with which "the 5 extension has Trolling contact. In practice there is clearance ofapproximatelyone-sixteenth of an inch between the inner faces of the lug l8 and the peripheral faces of the rollers I8 and a clearance oi! approximately one-thirty-second. of an placed that the spokesor arms I! are held in tangential relation tothe hub or to a circle concentric to the hub.

ame lines as f but'fshowing ;siig ht meme shown-iii Pigiire' i or -the'pi'ojetedlaces gtfthese Y v spokes or: arms ll which constitute part of the invention westofpowef ts nami-kn win w tbwoua m tnetweeter or i I w eel whether"; sprocket wheels, gear ne s,

wheel niay havedifierent' torms.'I dinere'nt forms are-indicated irizl igures' 4 to 64 a he Thus in Figure theflendsLJot the I -.'arms', which constitidte the working :face o! the 7 wheel, project beyond the' 'periphefiesot the side "pieces afi lqn; In 4,: t e arms-are lessened in length sothat a recess is Iormedbeeach drthe' a'r'm sat 'its outerendis' groovedfaslat 'spoke's or I 19101; the receptioii 'of abeit. In'Figu're 6,'each of the ami's is'"T sha'pe d in cros s 'sectiori' tofprovide V a a f'zi which nlay-*extendover'the peripheral edges of the sidefiiieces ll g' end tacesf ot the m be;- f bnned' with ""sprocket'teeth or gearteeth -itdsiredfi y fThe face 6! 'the f-sliapd portion' lll" in Figure 1. WSW mend we c e teth jor with gear-teeth'or may-belitplain tea e. dessedg ace wheelor'a gearwheelfmay hate drivin'g'engage'f m ent fwith' the wheel eithei'?by means of direct meshing chains I In I ml; 1 my inve t n; il l ngfiewer spokes or arms findt u bin ngnte m 'eonstruetiua "In this hown in nsures a and smasher m' carries' uponflt' "mews side pieces "21 and ,22,

oftheig'earteeth or bi belts "or tars j t me 9flf haiefshownianother each'havi'ng hubs-2'3 andspaced from each other agent the-outer end of. the spoke."

ftrah'sve s 'boltsuch asthe bolt?" in Figure ,1-

or a bolt suchias the bolt 2a m FigureB. In Figure :8, there are a plurality-of bolts 28 passing as shown'inltFigure Biwhere the spoke l is'illus vtl atedas being formed with a radial-slo ti 11 ,ad-'

through the slots 26 while pivot boltsfi29 pass through the inner ends of the spokes or arms 25 1 and through the two side pieces II and 22 ho1d+ ing these side pieces in engaged relation; The

bolts 28 in Figure 8 pass throughYthe slots 26 and through a'rim member 30 which is approxir mately -U-shaped in cross section as shown in Figure 9.7 The mldiile portion of each of -.these bolts carries upon it the roller 3| which bears against the walls of the corresponding slot 26. In order to limit the movement of the arms or spokes 25 in one direction, the rim 30 is formed on its side walls with an inwardly projecting stop lug 32and each of the disks 2| is formed with anoutwardly projecting stop lug 33, these stop lugs being disposed adjacent each other as shown in Figure 8. When the arms 25 swing toward the right in Figure8, they will engage against the rim of the wheel, and, therefore, thisrimfiwill prevent further movement in this direction of these arms 25. Thus the arms 25 will be limited-in of arms disposd between said plates and having their inner ends pivoted to said plates, the arms extending tangentially with reference to a circle concentric to the hub, a U-shaped rim embracing the ends of the arms, bolts' passing through the rim, the ends of the arms being slotted to receive said bolts, the rim having an inwardly projecting lug and one of the plates having an outwardly projecting lug confronting the lug on the rim and limiting the movement of thearms in one direction, the rim acting limit the movement of the arms in'another direction.

A power transmission, unit having. a hub ment of the arms 25 toward the 'iert'in Figure 8 will be limited by the engagement-of the stops 32 and 33, the slots 26 permitting; thismovement of the rim. In Figure 1, thearms M are held in their tangential position by reason-Oren: gagement with each other, but the arms as a whole are held from movement outiofia' tangential,positionrelative to the centerof rotation 'ofrthe shaft In by, means of'thebolts l1.

V In Figure 1,1 if thewheelior pulley is driven in a counter-clockwise direction, and a belt be appliedto the pu1ley,mthe belt B running in the direction illustrated, the force will then be transmitted from the shaft [0 tothe-'periphery .of the wheel or pulley and thus tothe belt: 1

i The action will tend to Iorcethe arms I4 outfward' thus increasing the-tractive engagement between the wheel and the belt or sprocket'chain passing ;thereover. The; same action will take place if, in Figure 1,ithe belt is disposedreversely :to the direction illustrated-andoperated to'drive the wheel in a clockwise-direction then-the tight run of the beltwill-causethe arms I4 to move on their pivotsybut enough" to tighten, up on the belt. I 1 q If power. belappliedto the belt B in Fi ure 7 to rotate the wheel shown-in-Figure 7 in a clockwise direction,'the arms will be turnedupon-their pivots in the position shown in Figure 8 and will act to shift 'therim irom a positionof eccentricity; to a 1 -,position.;of, ooncentricity to thus tighten up-- on, the belt and increase I tractive engagement.

t e w eel s qwnr r i es and B i iS as a driving medium;;and turnsinga counten clockwise direction-withthe belt extending as shown: in Figure -7, therim will be shifted from an eccentric position to a concentric position, lugs 32 and 33 will separate until thearms 25 swing out and engage the rim 30, thus-increasing the tractive engagementbetween the belt and wheel. 1 i 1 F While I have illustrated certain constructions which I have found to be particularly efiective, it is obvious that the principle of my. invention might. be applied in many ways without depart- ,ing from the spirit of 'the inventiona's deiined in the appended claims. I

'I claim:' q I 1. A power transmission wheel, having ahub,

the hub including two spaced plates, a plurality 4 including spaced plates concentric to the hub, tangential arms disposed between the plates, each arm"gradually increasing in width from the inner end of thearm outward and the arms projecting beyond the plates, bolts passing through the plates c'andpivotally supporting the inner ends of said arms, .a rim surrounding the extremities of the arms and; against which the extremities :01 the arms bear,.the rim being U-shaped in crosssectionto' embrace the arms, bolts passingtransversely through the rim, the arms being longi- ;tudi J y Slotted toreceive said bolts, and the ends of -.the1ar;ms being rounded to rockingly engage the rim, each-oi the plates being provided with anputwardly; projecting lug and the' rim being provided with inwardly projecting lugs vconfronting theiirstnamed lugs, said lugs limiting the movement of the arms in one-direction and 'the rimacting to limiting the movement ofv the arms in a direction out of their tangential posi; -.tion.l'* v 3. A power transmission wheel having a hub, the hub, including two laterally. spaced plates, a-plurality of arms, each pivoted at its inner end betweensaidplates, the arms extending tangentially=toa' ,circle concentric tothe hub, a. rim operatively connected to the arms forperipheral movement relative to;the hub and froma position of eccentricity to a position of concentricity of the hub, and means limiting the movement of the arms in a direction away'from a radial position including coacting lugs on the rim and hub, themovement ofthe arms toward a radial position being limited by engagement of the ends of the arms with the rim. I,

4.. ma; power transmission wheel having a hub including two spaced plates concentric to the hub, iapluralityof arms disposed between said plates, the arms gradually increasing in width from the inner end of;the". arms outward-the arms being disposed in a tangentialposition with reference to a c'ircle concentric to' the center of the hub,

.bolts passing through l the plates and. .inner ends of said arms, a rim having flanges'extending inwardon each side of the outer 'ends of the arms, guide bolts passingthrough said flanges adjacent theperiphery of the rim and through the spaces between said arms,ithe arms loosely engaging said bolts at both edges, each arm having a circumferentially extending portion extending over said 'boltsJsaid guide bolts, being provided with rollers. "j V 3' HENRY H. FRICK. 

